JUKI LK-1900B series Engineer's Manual

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CONTENTS
 1.Specications ................................................................................................................................ 1
 2.Conguration ................................................................................................................................. 5
(1)Namesofmainunit ....................................................................................................................................................... 5
(2)Namesandexplanationofswitchesontheoperationpanel ................................................................................... 6
 3.Standardadjustmentvalue ........................................................................................................... 8
(1)Mainshaftconnection/disconnection ........................................................................................................................ 8
(2)Removalofthemainshaftmotorandcoupling ...................................................................................................... 10
(3) Crankconnectingrodconnection/disconnection ....................................................................................................... 12
(4)Crankbalancerpositioning ....................................................................................................................................... 14
(5)Lowershaftbacklashadjustmentandconnection/disconnection ........................................................................ 14
(6)Oscillatorgearpositioning ........................................................................................................................................ 16
(7)Adjustmentofhookoilamount ................................................................................................................................. 16
(8)Shuttleconnection/disconnectionandoilwickpiping ........................................................................................... 18
(9)Adjustmenttheheightoftheneedlebar .................................................................................................................. 18
(10)Hookadjustment ........................................................................................................................................................ 20
(11)Threadtrimmercampositionadjustmentandconnection/disconnection ........................................................... 22
(12)Threadtrimmer/workclampfootoriginsensoradjustment .................................................................................. 22
(13)Adjustmentoftheheightoftheworkclampfoot ................................................................................................... 24
(14)Adjustmentofthethreadtrimmersensor ............................................................................................................... 24
(15)Adjustmentofthemovingknifeandcounterknifeposition ................................................................................. 26
(16)Adjustmentoftheheightofthemovingknifeandcounterknife .......................................................................... 26
(17)Inclinationofthebladepointofthecounterknife .................................................................................................. 28
(18)Floatingamountofthethreadtensiondisk ............................................................................................................ 28
(19)Secondthreadtensionconnection/disconnection ................................................................................................. 30
(20)ATunitconnection/disconnection ........................................................................................................................... 32
(21)Positionofthemechanicalorigin ............................................................................................................................. 34
(22)AdjustmentoftheYorigin ........................................................................................................................................ 34
(23)AdjustmentoftheXorigin ........................................................................................................................................ 36
(24)Adjustmentofthewiperposition ............................................................................................................................. 36
(25)Adjustmentofthewiperspring(LK-1903B,1903BN) ............................................................................................. 38
(26)AdjustmentofthepositionoftheXfeedmotorandtheYfeedmotor
  (Adjustmentofthebacklashofthedrivinggear) ................................................................................................... 38
(27)Installingthefeedplatesupportplate ..................................................................................................................... 40
(28)Installationofthefeederbarrearcover................................................................................................................... 40
(29)Adjustmentofthebobbinwinderdrivingwheelposition ...................................................................................... 42
(30)Adjustmentofthebobbinwinderamount ............................................................................................................... 42
(31)Adjustmentoftheshuttleupperspringposition
 (ExceptforLK-1900B-BS,1900B-BF,1903B-BS,1900BN-BS,1900BN-BFand1903BN-BS) ............................... 44
(32)Shuttlefelt ................................................................................................................................................................... 44
(33)Shapeoftheinnerhookpresser .............................................................................................................................. 46
(34)Adjustmentofthethreadtake-upspring ................................................................................................................. 46
(35)Needlethreadclampdeviceconnection/disconnection ........................................................................................ 48
(36)Adjustmentoftheneedlethreadclampreferenceposition................................................................................... 50
(37)Adjustmentoftheneedlethreadclampnotch ........................................................................................................ 52
(38) Assemblingtheshorterthreadremainingunit ........................................................................................................ 54
(39)Assemblingthemovingknifedrivesectionofshorterthreadremaining ............................................................ 54
(40)Assemblingthesuctionpipe .................................................................................................................................... 56
(41)Adjustmentoftheshuttleupperspringposition(LK-1903B-BS,1900B-BS,1900B-BF,1903BN-BS,
  1900BN-BS,1900BN-BF)andthelowerthreadholderposition(LK-1903BN-BS) ............................................... 58
(42)Bobbincasewithanidlingpreventionspring ........................................................................................................ 60
 4.Descriptionofthefunctions ....................................................................................................... 61
(1)Tousethefunctionsoftheservicepersonlevel ...................................................................................................... 61
(2)Contrastadjustment ................................................................................................................................................... 62
(3)USBformat .................................................................................................................................................................. 62
(4)Keylocksetting .......................................................................................................................................................... 63
(5)Howtochecktheversioninfoemation ..................................................................................................................... 65
(6)Howtousethecommunicationfunction(CommunicationfunctionsotherthanNFC) ....................................... 66
(7)RegisteringanNFCterminal ..................................................................................................................................... 70
(8)PatternselectionfromtheUSBthumbdrive ........................................................................................................... 73
 5.Memoryswitches ......................................................................................................................... 74
(1)Memoryswitchstartandchange .............................................................................................................................. 74
(2)Tableofmemoryswitchfunctions ............................................................................................................................ 75
(3)Supplementforthememoryswitch .......................................................................................................................... 82

JUKI LK-1900B series Specifications

General

Brand	JUKI
Model	LK-1900B series
Category	Sewing Machine
Language	English